CN109061373B - Automatic detection circuit device for signal broken line and short circuit of four-terminal potentiometer - Google Patents
Automatic detection circuit device for signal broken line and short circuit of four-terminal potentiometer Download PDFInfo
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- CN109061373B CN109061373B CN201811139818.6A CN201811139818A CN109061373B CN 109061373 B CN109061373 B CN 109061373B CN 201811139818 A CN201811139818 A CN 201811139818A CN 109061373 B CN109061373 B CN 109061373B
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- potentiometer
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- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 238000005070 sampling Methods 0.000 claims abstract description 50
- 238000012360 testing method Methods 0.000 claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 63
- 238000002955 isolation Methods 0.000 claims description 6
- 239000003381 stabilizer Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
The automatic detection circuit device for the broken wire and the short circuit of the four-terminal potentiometer signal comprises four groups of automatic detection circuits with the same structure, wherein in each group of automatic detection circuits for the broken wire and the short circuit, one end of an input end is connected with the four-terminal potentiometer, the other end of the input end is connected with a potentiometer power supply circuit, the potentiometer power supply circuit is connected with an amplifier and an A/D sampling circuit, the A/D sampling circuit is connected with an A/D sampling control circuit, the A/D sampling control circuit is connected with a test voltage generator, the test voltage generator is connected with the potentiometer power supply circuit, and the amplifier is connected with an output end; the test voltage generator and the A/D sampling circuit are arranged for automatically detecting the broken line condition of all leads of the four-terminal potentiometer, detecting the mutual short circuit condition among the leads and reporting the detection result to the A/D sampling control circuit, and the four-terminal potentiometer has the characteristics of comprehensiveness in detection, instantaneity, high reliability and strong practicability.
Description
Technical Field
The invention relates to the technical field of automatic detection, in particular to an automatic detection circuit device for signal disconnection and short circuit of a four-terminal potentiometer.
Background
The four-terminal potentiometer is used as a control circuit of the sensor, such as a control circuit of rotation angle signal processing, and a multi-potentiometer channel and multi-redundancy design method is generally adopted in the control circuit of rotation angle signal processing, so that the number of potentiometer leads is increased, the potentiometer signals are led out through a plug and a lead, and faults such as poor contact, broken wire, short circuit and the like of the lead cannot be avoided.
In order to find out such fault problems as poor contact, broken wire, short circuit and the like of the lead in time, developing a device for solving the problems is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The technical problem solved by the invention is to provide an automatic detection circuit device for signal disconnection and short circuit of a four-terminal potentiometer, so as to solve the defects in the background technology.
The technical problems solved by the invention are realized by adopting the following technical scheme:
the automatic detection circuit device for the broken wire and the short circuit of the four-terminal potentiometer signal comprises four groups of automatic detection circuits with the same structure, wherein each group of automatic detection circuits for the broken wire and the short circuit comprises an input end, an output end, a potentiometer power supply circuit, an amplifier, a test voltage generator, an A/D sampling control circuit and an A/D sampling circuit; the specific structure is as follows:
the first lead is respectively connected with the A/D sampling circuit, the first capacitor and the fifth resistor of the potentiometer power supply circuit;
the second lead is respectively connected with one end of the A/D sampling circuit, the second resistor and the third resistor of the test voltage generator and one end of the sixth resistor of the amplifier;
the third lead is respectively connected with the second capacitor and the seventh resistor of the A/D sampling circuit and the potentiometer power supply circuit;
the tenth resistor of the amplifier is respectively connected with the A/D sampling circuit, the seventh capacitor and the output end, and the other end of the seventh capacitor is connected with the grounding wire; the test voltage generator is connected with the A/D sampling control circuit through a fourth resistor.
In the invention, an isolation circuit is arranged between the A/D sampling control circuit and the fourth resistor; an isolation circuit is provided between the A/D sampling control circuit and the A/D sampling circuit.
In the invention, the test voltage generator comprises a first resistor, a second resistor, a first triode and a second diode, wherein one end of the second resistor is connected with the third resistor, the other end of the second resistor is connected with a ground wire, the other end of the third resistor is connected with one end of the second diode, the other end of the second diode is connected with one end of the first triode, the other end of the first triode is connected with the fourth resistor, and the first triode is also connected with the first resistor in parallel.
In the invention, the potentiometer power supply circuit comprises a fifth resistor, a seventh resistor, a first capacitor and a second capacitor, wherein the fifth resistor is connected with one end of the first capacitor, and the other end of the first capacitor is connected with a grounding wire; the seventh resistor is connected with one end of the second capacitor, and the other end of the second capacitor is connected with the grounding wire.
In the invention, the amplifier further comprises a sixth resistor, an eighth resistor to a tenth resistor, a third capacitor and a fourth capacitor, wherein the first operational amplifier is respectively connected with one end of the sixth resistor, the ninth resistor, the tenth resistor, the third capacitor and one end of the fourth capacitor, the first operational amplifier is also connected with the eighth resistor in parallel, the other end of the ninth resistor is connected with a grounding wire, the other end of the third capacitor is connected with the grounding wire, and the other end of the fourth capacitor is connected with the grounding wire.
In the invention, the A/D sampling circuit is composed of a sampling integrated circuit, a fifth capacitor, a sixth capacitor, an eighth capacitor, ninth to fourteenth capacitors, an eleventh resistor and a voltage stabilizer.
The beneficial effects are that: the invention is composed of four groups of automatic detection circuits with the same structure for broken line and short circuit, and by arranging the test voltage generator and the A/D sampling circuit, the invention is used for automatically detecting the broken line condition of all leads of the four-terminal potentiometer, can also detect the mutual short circuit condition among the leads, and reports the detection result to the A/D sampling control circuit, and has the characteristics of comprehensive detection, real-time performance, high reliability and strong practicability.
Drawings
FIG. 1 is a schematic block diagram of a preferred embodiment of the present invention.
Fig. 2 is a circuit block diagram of a preferred embodiment of the present invention.
Detailed Description
The invention is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the invention easy to understand.
Referring to FIG. 1-2, a four-terminal potentiometer signal open Circuit automatic detection Circuit device is composed of four groups of open Circuit automatic detection circuits with the same structure, each group of open Circuit automatic detection circuits comprises an Input end Input1, an Output end Output1, a potentiometer power supply Circuit I, an Amplifier, a test voltage generator BIT Online, an A/D sampling control Circuit A/D and level control, an A/D sampling Circuit, a grounding wire P1GND, a first triode V1, a second diode V2, a first resistor R1-an eleventh resistor R11, a first capacitor C1-a fourteenth capacitor C14, a first operational Amplifier N1, an A/D sampling integrated Circuit N2, a voltage stabilizer N3 and an isolation Circuit Isolated Circuit, one end of an Input end Input1 is connected with a four-terminal potentiometer, the other end of the Input end Input1 is connected with a potentiometer power supply Circuit I, the potentiometer power supply Circuit I is connected with an Amplifier and an A/D sampling Circuit, the A/D sampling Circuit is connected with an A/D sampling control Circuit A/D and level control, the A/D sampling control Circuit A/D and level control is connected with a test voltage generator BIT Online, the test voltage generator BIT Online is connected with the potentiometer power supply Circuit I, the Amplifier is connected with an Output end Output1, the Input end Input1 comprises first leads P1-R1 to third leads P1-R3 and a grounding wire P1GND, and the Amplifier comprises a first operational Amplifier N1;
the first lead wires P1-R1 are respectively connected with the first capacitor C1 and the fifth resistor R5 of the A/D sampling Circuit and the potentiometer power supply Circuit I;
the second leads P1-R2 are respectively connected with one ends of the A/D sampling circuit, a second resistor R2 and a third resistor R3 of the BIT Online of the test voltage generator and a sixth resistor R6 of the Amplifier;
the third leads P1-R3 are respectively connected with the second capacitor C2 and the seventh resistor R7 of the A/D sampling Circuit and the potentiometer power supply Circuit I;
the tenth resistor R10 of the Amplifier is respectively connected with the A/D sampling circuit, the seventh capacitor C7 and the Output end Output1, and the other end of the seventh capacitor C7 is connected with a grounding wire; the test voltage generator BIT Online is connected with the A/D and level control sampling control circuit through a fourth resistor R4;
an isolation Circuit Isolated Circuit is arranged between the A/D sampling control Circuit A/D and level control and the fourth resistor R4; an Isolated Circuit is arranged between the A/D and level control of the A/D sampling control Circuit and the control end of the A/D sampling Circuit;
the test voltage generator BIT on comprises a first resistor R1-a fourth resistor R4, a first triode V1 and a second diode V2, wherein one end of the second resistor R2 is connected with a third resistor R3, the other end of the second resistor R2 is connected with a grounding wire, the other end of the third resistor R3 is connected with one end of the second diode V2, the other end of the second diode V2 is connected with one end of the first triode V1, the other end of the first triode V1 is connected with the fourth resistor R4, and the first triode V1 is also connected with the first resistor R1 in parallel;
the potentiometer power supply Circuit I comprises a fifth resistor R5, a seventh resistor R7, a first capacitor C1 and a second capacitor C2, wherein the fifth resistor R5 is connected with one end of the first capacitor C1, and the other end of the first capacitor C1 is connected with a ground wire; the seventh resistor R7 is connected with one end of the second capacitor C2, and the other end of the second capacitor C2 is connected with a grounding wire;
the Amplifier further comprises a sixth resistor R6, an eighth resistor R8-a tenth resistor R10, a third capacitor C3 and a fourth capacitor C4, wherein the first operational Amplifier N1 is respectively connected with one end of the sixth resistor R6, one end of the ninth resistor R9, one end of the tenth resistor R10, one end of the third capacitor C3 and one end of the fourth capacitor C4, the first operational Amplifier N1 is also connected with the eighth resistor R8 in parallel, the other end of the ninth resistor R9 is connected with a grounding wire, the other end of the third capacitor C3 is connected with the grounding wire, and the other end of the fourth capacitor C4 is connected with the grounding wire;
the A/D sampling circuit consists of a sampling integrated circuit N2, a fifth capacitor C5, a sixth capacitor C6, an eighth capacitor C8, ninth capacitors C9-fourteenth capacitors C14, an eleventh resistor R11 and a voltage stabilizer N3, and is designed according to a typical application circuit of the A/D sampling integrated circuit.
Principle of operation
As shown in FIG. 2, the resistance of the four-terminal potentiometer is 2KΩ, which is the fourth terminal potentiometerU when the lead P1-R1 and the ground line P1GND are normal P1-R1 <9V; when only the first lead P1-R1 is disconnected, U P1-R1 =9v, thereby judging that the first lead P1-R1 is disconnected; similarly, the third leads P1-R3 are judged to be disconnected;
real-time on-line monitoring U output1 Voltage, record U output1 The voltage value of the first triode V1 is conducted, +5V voltage is added into the amplifier through the second diode V2, the third resistor R2 and the third resistor R3, if the second lead P1-R2 is not disconnected because the resistance value of the third resistor R3 is large (120 KΩ), the applied +5V voltage is pulled down by the voltage division on the second lead P1-R2 because the impedance of the terminal of the second lead P1-R2 to the ground is smaller, namely U is obtained after the +5V voltage is applied P1-R2 Variation of<0.1V, U output1 The voltage value is kept unchanged (change<0.1V), the judgment method is as follows: u before and after the first triode V1 is conducted output1 The voltage value remains unchanged (change<0.1V), it is determined that the second lead P1-R2 is not disconnected, and if the first triode V1 is turned on before and after U output1 The voltage value changes by 0.2V-0.3V, and the second lead P1-R2 is judged to be disconnected;
even if the grounding wire P1GND is disconnected, the circuit can still work normally and is not affected, and only a small amount of change of the zero position of the circuit is possible, so that the judgment of whether the grounding wire P1GND is disconnected or not is not needed;
the same method concludes if there is a short circuit condition for each lead.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The automatic detection circuit device for the broken wire and the short circuit of the four-terminal potentiometer signal is characterized by comprising four groups of automatic detection circuits with the same structure, wherein each group of automatic detection circuits for the broken wire and the short circuit comprises an input end, an output end, a potentiometer power supply circuit, an amplifier, a test voltage generator, an A/D sampling control circuit and an A/D sampling circuit; the specific structure is as follows:
the first lead is respectively connected with the A/D sampling circuit, the first capacitor and the fifth resistor of the potentiometer power supply circuit;
the second lead is respectively connected with one end of the A/D sampling circuit, the second resistor and the third resistor of the test voltage generator and one end of the sixth resistor of the amplifier;
the third lead is respectively connected with the second capacitor and the seventh resistor of the A/D sampling circuit and the potentiometer power supply circuit;
the tenth resistor of the amplifier is respectively connected with the A/D sampling circuit, the seventh capacitor and the output end, and the other end of the seventh capacitor is connected with the grounding wire; the test voltage generator is connected with the A/D sampling control circuit through a fourth resistor;
the test voltage generator comprises a first resistor, a second resistor, a first triode and a second diode, wherein one end of the second resistor is connected with the third resistor, the other end of the second resistor is connected with a ground wire, the other end of the third resistor is connected with one end of the second diode, the other end of the second diode is connected with one end of the first triode, the other end of the first triode is connected with the fourth resistor, and the first triode is connected in parallel with the first resistor;
the potentiometer power supply circuit comprises a fifth resistor, a seventh resistor, a first capacitor and a second capacitor, wherein the fifth resistor is connected with one end of the first capacitor, and the other end of the first capacitor is connected with a grounding wire; the seventh resistor is connected with one end of the second capacitor, and the other end of the second capacitor is connected with the grounding wire;
the amplifier further comprises a sixth resistor, an eighth resistor, a tenth resistor, a third capacitor and a fourth capacitor, the first operational amplifier is connected with one ends of the sixth resistor, the ninth resistor, the tenth resistor, the third capacitor and the fourth capacitor respectively, the first operational amplifier is further connected with the eighth resistor in parallel, the other end of the ninth resistor is connected with a grounding wire, the other end of the third capacitor is connected with the grounding wire, and the other end of the fourth capacitor is connected with the grounding wire.
2. The automatic detection circuit device for signal disconnection and short circuit of four-terminal potentiometer according to claim 1, wherein an isolation circuit is arranged between the a/D sampling control circuit and the fourth resistor.
3. The automatic detection circuit device for signal disconnection and short circuit of four-terminal potentiometer according to claim 1, wherein an isolation circuit is arranged between the a/D sampling control circuit and the a/D sampling circuit.
4. The automatic detection circuit device for signal disconnection and short circuit of four-terminal potentiometer according to claim 1, wherein the A/D sampling circuit comprises a sampling integrated circuit, a fifth capacitor, a sixth capacitor, an eighth capacitor, ninth to fourteenth capacitors, an eleventh resistor and a voltage stabilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811139818.6A CN109061373B (en) | 2018-09-28 | 2018-09-28 | Automatic detection circuit device for signal broken line and short circuit of four-terminal potentiometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811139818.6A CN109061373B (en) | 2018-09-28 | 2018-09-28 | Automatic detection circuit device for signal broken line and short circuit of four-terminal potentiometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109061373A CN109061373A (en) | 2018-12-21 |
| CN109061373B true CN109061373B (en) | 2024-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811139818.6A Active CN109061373B (en) | 2018-09-28 | 2018-09-28 | Automatic detection circuit device for signal broken line and short circuit of four-terminal potentiometer |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111367256B (en) * | 2020-03-03 | 2022-03-29 | 中国船舶重工集团公司第七0七研究所九江分部 | RVDT steering hand wheel control device and automatic detection method |
| CN111323731B (en) * | 2020-03-30 | 2022-08-19 | 珠海优特电力科技股份有限公司 | Method and device for detecting fault of grounding device and storage medium |
| CN111679222A (en) * | 2020-05-15 | 2020-09-18 | 深圳市崧盛电子股份有限公司 | Detection circuit for short circuit between metal packaging tube and metal radiating fin and short circuit detection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4362987A (en) * | 1980-09-12 | 1982-12-07 | Huntron Instruments, Inc. | Apparatus for detecting electrical shorts in electronic circuits |
| CN102638024A (en) * | 2012-04-16 | 2012-08-15 | 北京航天发射技术研究所 | Neutral line break protector |
| CN104330152A (en) * | 2014-11-25 | 2015-02-04 | 重庆矢崎仪表有限公司 | Buzzer sound testing circuit |
| CN205317883U (en) * | 2015-11-13 | 2016-06-15 | 浙江涵普电力科技有限公司 | Current transformer secondary side winding short circuit open -circuit condition detection circuitry |
| CN106100307A (en) * | 2016-06-30 | 2016-11-09 | 阳光电源股份有限公司 | A kind of Switching Power Supply and short-circuit protection method thereof |
| CN209014675U (en) * | 2018-09-28 | 2019-06-21 | 中国船舶重工集团公司第七0七研究所九江分部 | A kind of short-circuit automatic detection circuit of four terminal potential device signals broken string |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8493072B2 (en) * | 2010-03-09 | 2013-07-23 | Koninklijke Philips N.V. | Method and apparatus for detecting a short circuit |
-
2018
- 2018-09-28 CN CN201811139818.6A patent/CN109061373B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4362987A (en) * | 1980-09-12 | 1982-12-07 | Huntron Instruments, Inc. | Apparatus for detecting electrical shorts in electronic circuits |
| CN102638024A (en) * | 2012-04-16 | 2012-08-15 | 北京航天发射技术研究所 | Neutral line break protector |
| CN104330152A (en) * | 2014-11-25 | 2015-02-04 | 重庆矢崎仪表有限公司 | Buzzer sound testing circuit |
| CN205317883U (en) * | 2015-11-13 | 2016-06-15 | 浙江涵普电力科技有限公司 | Current transformer secondary side winding short circuit open -circuit condition detection circuitry |
| CN106100307A (en) * | 2016-06-30 | 2016-11-09 | 阳光电源股份有限公司 | A kind of Switching Power Supply and short-circuit protection method thereof |
| CN209014675U (en) * | 2018-09-28 | 2019-06-21 | 中国船舶重工集团公司第七0七研究所九江分部 | A kind of short-circuit automatic detection circuit of four terminal potential device signals broken string |
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| CN109061373A (en) | 2018-12-21 |
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